function identify(){
    return this.name.toUpperCase();
}
function speak(){
    var greeting='Hello,i\'m'+identify.call(this);
    console.log(greeting);
}
var me={
    name:'Kyle'
}
var you={
    name:'Reader'
}
identify.call(me);
identify.call(you);
speak.call(me);
speak.call(you);